Roof joint



May 12, 1931. J. L. SCHALLER ROOF JOINT I 3 Sheets-Sheet 1 Filed Aug. 19, 1935 fill/612201" Johnlfivlzalla filial May 12, 1931. J. L. SCHALLER 1,805,110

ROOF JOINT Filed Aug. 19, 1925 3 Sheets-Sheet 2 Inventor \-d oknl fi'fllaaller filial-neg y 12, 1931- I J.YL. SCHALLER 1,805,110

ROOF JOINT Filed Aug. 19, 1925 5 Sheets-Sheet 3 I i f Q iii 3! \a,

\g Inventor Qk Joluzl flakallel' Patented May 12,. 1931 UNIE STATES.

JOHN LEO SCI-IALLER, OF WELLESLEY, MASSACHUSETTS ROOF JOINT Application filed. August 19, 1925. Serial No. 51,262.

The subject matter herein involves the roof joint so-called,the same being the seal between the roof itself andany protruding pipe or vent. The problem of sealing a vertical '5 pipe'in a roof which may be built in or assume by settling any variety of slant is a serious one. For any roof of definite angle it is easy to provide'sealing members, but roofs vary in specification and in resultant 19 execution.

One answer is to build a roof absolutely V uniform to a given pitch and keep it so. The

seal could then be provided.

In practice there are two ways of dealing with the problem. One is to provide a considerable number of joints, each adapted to a given pitch or approximations thereof. .The other is to provide a joint which can be cut over or refitted to adapt it to various pitches.

"2,0 It has been attempted to provide a joint in which therewere certain adjustments possible, but as far as I am advised these have been of a limited nature.

My present invention contemplates a roof 2, joint in whichtwo cooperating .parts provide a maximum range of angle variance.- The provisions for this feature together with various specific improvements constituting my invention will be more clearly set forth in the specification which follows.

i As illustrative of my invention I have shown in the accompanying drawings a form ofmy invention well adapted. to practical use and I have attempted to illustrate the prin- -.3 ciples thereof diagrammatically to show the wide variationsin which the invention proper might be applied, adapted orembodied.

Themore general aspect of my invention involves bearing surfaces inclusive of vari 40 ous bearing lines which are figures of conic section of considerable variety. These are difficult to show but readily understood by.

To make those familiar with such figures. this clear I will proceed to a discussion of the embodiment shown in the drawings in which like reference characters are used to indicate the parts described in the specification. In the drawings:

Fig. 1 is a side elevation of V a roof joint, partly broken away. Y

Fig. Zis a plan view thereof. I

Figs. 3, 4t and 5 are views illustrative of different adjustments.

Figs. 3 4 and 5 are diagrammatic developments of Figs. 3, 4 and 5, respectively.

Figs. 6 and 7 are sections on the lines 6-6 and 77respectively, of Fig. 3, and

Fig. 8 is a detail view of asplittable packing ring used with my invention.

Referring-now to the drawings, it will be seen that I provide theusual roof plate 1 Which is apertured for the passage of a pipe, such as 2. This aperture is large enough. to permit a wide range of angular disposition of the pipe 2 as will-be hereinafter described. 1 On the plate 1 is a riser 3 preferably of copper or other somewhatsoft 'or ductile material. The riser 3 is generally conic and may be a portionof a circularcone or a cone of slightly variant radius. 'The base of the member 3 is cut at an angle to the normal axis-of the cone in one direction, whereasthe top of the 7 member 3 is truncated at an angle slightly in the other direction to -the axis. The riser 3 is attached to the plate 1 in anyusuali manner fitting tightly over its aperture. 7

The member lis a collar-preferably a rigid casting. At its lower end it slightly: flares,

having its inner surface beveled off in a cone,

the axis of which is skewed to the normal axis of the collar so that its inner surface presents a bevel more acute'on one side-than on the other. That is tosay, it isa cone of variant radius and variant pitch. This gives an internal bearing surface on the lowerend 7 of the collar 4: 'possessingja maxi-mum varlety of potential bearing lines in the various f secant planes which pass throughlthisbear ing zone at difierent angles to the axis; ofthe collar. This internal'bearing surface taken with the external bearing'surface of the] top of the riser3 withall" of'its potentiallines of hearing which would be forme'dby angle secant planes makesa potential mutual bearing possible for almost any pitch of roof. These lines of bearing are generally elliptical in form and of a great. variety of'shapes according totheangle ofthe plane of contact between the cap 4; andthe top o-f'the riser 3.; As above suggested, one 'orboth of the-Incin-v bers 3 and 4; may be of variant radius in which case the lines of contact would be somewhat more apioidal than elliptical.

I have illustrated in Fi s. 3, 4 and 5, three normal roof positions of the joint. In these I) which is indicated in said figures by the geometrical figure cde, and the surface 3 of the member 3 is shown as spaced from the surface P of member 4 throughout the zone a.

In Fig, 4, and its corresponding diagram Fig. 4f, the surface 3 of the member 3 is shown as bearing upon the surface 4 of the member 4 throughout a zone 6 which is indicated in said figures by the geometrical figure fgh, and the surface 3 of the member 3 is shown as spaced from the surface l of member 4 throughout the zone a.

In Fig. 5, and its corresponding diagram 5, the. surface 3? of the member 3 is shown as bearing upon the surface l" of the memberl throughout a zone 7) which is cated in said figures by the geometrical figure 2'j7c, and the surface 3 of the memher 3 isshown as spaced from the surface i of member 4 throughout the zone a.

These several diagrams illustrate the wide increase in zones possible by working the combinations of the bearings of the two parts.

In order to provide a tightly sealed oint,

between the member 4; and pipe 2, the memher 4. has an internal shoulder 5 near its up per end defining a packing chamber 6 the wallof which hasa slight incline and is provided with a groove 9 for bonding the pack ing. Lodged within said chamber is a pair of superposed packing rings 7 and-8. The upper ring 8 is a split ring of lead or the like and rests on the lower ring 7, which is a splittable ring of cast iron resting on the shoulder 5. Both rings are beveled, the bevel of ring 7 preferably being at slightly less incline than the wall of the chamber 6, so that the act of pressing the ring 8 down onto the ring 7 forces the ring tightly to its seat on the shoulder 5.

- Various modifications and adaptations may be used in accordance with the principles of my invention without departing from the spirit thereof as defined in the appended claims. 7

What I therefore claim and desire to secure by Letters Patent is:

1. A roofjoint comprising aflexible frustroconic riser and a rigid collar having an interiorly beveled lower skirt bearing surface of irregular conic section of varying inclination telescopically fitteu upon said riser and independently rotatably adjustable thereon into a position wherein a portion of the zone of mutual bearing contact between the riser and the bevelled skirt of the collar occupies a secant plane which is generally horizontal.

2. A roof joint comprising a frustro-conic riser and collar having an interior-1y beveled lower skirt bearing surface of irregular conic section of varying inclination telescopically fitted upon said riser and independently rotatably adjustable thereon into a position wherein a portion of the zone of mutual bearing contact between the riser and the bevelled skirt of the collar occupies a secant plane which is generally horizontal, said collar having an upper packing receiving portion interiorly thereof. 5

3. A. roof joint comprising a substantially frustro-coni.cal riser and a cylindrical collar adapted to be loosely and rotatably engaged its lower end over the upper end portion of th riser, thelower end portion of the collar being substantially conically flared with the axis of said conical portion inclined relative to the axis of the collar, whereby with the axis of the collar disposed at any given inclination ith respect to the axis of the riser'within predetermined angular limits the collar is rotatable to a position in which the lower flared end portion thereof has substantially continuous surface contact with the riser throughout the circumference of the riser and the collar.

4. A roof joint comprisinga frustro-conical riser all surface portions of which have different cone angles, and a cylindrical collar adapted to be loosely and rotatably engaged at its lower end over the upper end portion of the riser, the lower end portion of the collar being conically flared withthe axis of said conical portion inclined relative to the axis of the collar, and all parts of said conically flared portion having different cone angles, whereby with the axis of the collar disposed at any given inclination with respect to the axis of the riser within predetermined angular limits the collar is rotatable to a position in which the lower flared end "oortion thereof has substantially continuous surface contact with the riser throughout the circumference of the riser and the collar.

In testimony whereof I affix my signature.

JOHN LEO SCHALLER. 

